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Summary. An investigation was made of twenty successive cases of developmental speech defects. They were divided according to the type of speech disorder (Greene 1960) into a ‘Motor’ group (eight children) and a ‘Language’ group (twelve children). In the Motor group, but not the Language, there was evidence of delay in general motor maturation. The two groups were compared on measures of mechanical reading, consistency of laterality and W.I.S.C. subtests. Both groups were very poor at reading, but whereas all the Motor group had inconsistent laterality, only a third (i.e., a normal proportion) of the Language were inconsistent; on the other hand, the Motor group had a much better knowledge of right and left. The Language group, but not the Motor, had poor scores on the Arithmetic and Digit Span subtests. Also the Language group was significantly worse than the Motor on Block Designs. It was suggested that these might represent two distinct groups of developmental language defects, and that recognition of the two might help to explain some of the contradictions in the literature. |
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